The purpose of this paper is to show that the theory of Functional Discourse Grammar constitutes a powerful model to account for the complex phenomenon of Neg-Raising in a consistent and systematic way. Previous studies on Neg-Raising, the phenomenon involving the transfer of the negative from a complement clause to the matrix clause, have traditionally characterized it in terms of syntactic and, more extensively, semantic criteria. These studies have focused on the delimitation of the type of verbs involved in this construction, since Neg-Raising is only allowed by some complement taking verbs, all related to certain kinds of modality. However, despite having been studied extensively, Neg-Raising remains an unclear phenomenon in certain respects. Taking as a point of departure the classification of Complement Clauses resulting from the application of the three parameters (Entity Type, Presupposition and Factuality) proposed within Functional Discourse Grammar, it is possible to arrive at a consistent delimitation of the constructions exhibiting Neg-Raising. Furthermore, the Morphological Level allows accounting for Neg- Raising without resorting to any kind of movement rule. It is through the operation of Morphological Encoding that the negative comes to occupy its position in the matrix clause.